MultiShardDataReader Multiple Result Sets

Could someone explain the reasoning behind not supporting multiple result sets.
e.g.
```
using (var cnn = new MultiShardConnection(shardmap.GetShards(), credentialString))
{
using (var cmd = cnn.CreateCommand())
{
cmd.CommandText = "SELECT [Id], [Value] FROM [ValueTable]; SELECT [Id], [Name] FROM [NameTable];";
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
Console.WriteLine("Id: {0}, Value: {1}", reader.GetInt32(0), reader.GetInt32(1));
}
if (reader.NextResult())
{
while (reader.Read())
{
Console.WriteLine("Id: {0}, Name: {1}", reader.GetInt32(0), reader.GetString(1));
}
}
}
}
}
```

I can see internally that your running a ConcurrentQueue and Dequeuing the LabeledDbDataReaders but I'm not sure why you couldn't keep a List of currentlyRead readers once you complete a result set in a reader add it to the List. Then when NextResult() is called move all the readers back to the queue and being reading again.